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    Ô­À´ÒÔΪnetcat×ö²»µ½£¬Ô­À´ÊÇ×Ô¼ºÏë²»µ½£¬¶ø²»ÊÇnetcat×ö²»µ½……
    ·½·¨ÈçÏ£º
    $ mknod backpipe p
    ½¨Á¢Ò»¸öÃüÃû¹ÜµÀ.
    listener-to-client ת·¢£º
    $ nc -l -p [localport] 0< backpipe |
        nc [target ip] [port] |
        tee backpipe
    ƯÁÁ°É£¿
    ¼ÌÐø£º
    listener-to-listener ת·¢£º
    $ nc -l -p [localport] 0< backpipe |
        nc -l -p [localport2] |
        tee backpipe
   
    client-to-client ת·¢£º
    $ nc [ip1] [port1] 0< backpipe |
        nc [ip2] [port2] |
        tee backpipe
   
»¹ÓиüÀ׵ķ½·¨£¬ÓÃ×ÔÉíµÄ -e ²ÎÊý£º
    $ echo nc [ip] [port] > relay.sh
    $ chmod +x relay.sh
    $ nc -l -p [port2] -e relay.sh
    ÎÒÔβËÁË£¬Ô­À´ÄǸö³ÌÐòÊǰ×дÁË¡£
    Ç¿´óµÄlinux, Ç¿´óµÄnetcat !


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http://ph4nt0m.net/bbs/showthread.php?threadid=22510
http://ph4nt0m.net/bbs/showthread.php?threadid=857
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http://hi.baidu.com/%D0%ED%D0%F1%D6%F9/blog/item/f103b0cf214fbb0a93457ed8.html
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useradd tom
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userdel tom
3.passwd Óû§Ãû
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ÔÚlinuxÏ »ñÈ¡£¬Ð޸ı¾»úIPµØÖ·µÄÁ½¸öº¯Êý

//»ñÈ¡±¾»úIPµØÖ·º¯Êý
QString GetLocalIp()
{
int sock_get_ip;
char ipaddr[50];
struct sockaddr_in *sin;
struct ifreq ifr_ip;
if ((sock_get_ip=socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
printf("socket create failse...GetLocalIp!\n");
return ""; ......

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